Food cooking device



R. SARDESON FOOD COOKING DEVICE May 26, 1942. 2,284,450

Filed July 28, i939 4 Sheets-Sheet 2 SH01-MAJ@ Robert Sardesok 4 sheets-sheet s May 26,1942. Y l R v-sARDEsoN l 2,284,450

FOOD COQKI'NG DEVICE ze s1 17 11@ 1552748518 i571 @2M 1 Y tiene@ mayas, i942 omi-so STATES PATENT' Aori-cs roon Cookino DEVICE Robert Sardeson, Minneapolis, Minn., or to Harold C. Genter, Miami Beach,

Application July 28, 1939, Serial No. 287.098 I Claims. (Cl. 21S-1 9) My invention relates-to` food cooking devices and to operating mechanisms and timing mechanisms therefor and has for an object to provide a food'cooking device which will be highly ecient and practical.

Another object of the invention resides in providing a food cooking device which will be extremely simple in construction and utilize a minimum number of parts.

A still further object of the invention resides in providing a food cooking device operable to procure sucient timing for the purpose of toasting bread and similar purposes without the use of the socalled conventional clockwork.

A still further objectl of the invention resides in providing a food cooking device having heating means and food shifting means for moving the food toward and from the heating means and also having resilient means for moving the food shifting means from operative position to inoperative position.

An object of the invention resides in providing a latch 'for holding the food shifting means in its operative position and further in providing spring biased means tensioned during initiation. of a cooking period for urging the latch into releasing position and in further providing a thermally controlled member for restraining movement of said spring-biased means. v

A feature of the invention resides in constructing the spring `biased means with a movable member adapted to move to a position in which the said member disengages the latch and in employing resilient means tending to urge movementof said member to such position.

Another object of the invention resides in providing a thermally responsive member for controlling thev movement of said movable member and holding the same from disengagementfrom the latch until the completion of a cooking period.

'iurther object of the invention residesin constructing said movable member in the form of a. hammer adapted to give the latch a blowl to positively disengage the latch and release the food shifting means at the required time.

Another object of the invention resides in providing a switch operated concurrently with the food shifting means and adapted to be held in closed position by said latch and to'be simultaneously released with said food shifting means upon disengagementoi the latch. y

An object of the invention resides in pivotally supporting said movable member and in causing the resilientmeans to `rotate said kvmember about its pivot in one direction,

`adapted to engage said pallets for controlling the movement thereof. I Y

An object of the invention resides in providing an auxiliary heater for the thermally responsive member and in controlling its energization by movement of the movable member.

Another object-of the invention resides in providing means for adjusting the distance between the pivot of said movable member and the pivot of said escapement for -varying the depth of engagement of the pallets with the teeth of the pivoted member.

Other objects of the invention reside in the novel combination and arrangement of parts and in the details of construction hereinafter illustrated and/or described.

In the drawings: v y

Fig. 1 is a plan view` of a bread toaster illus- .trating an embodiment of my invention.

2o Fig. 2 is an elevational sectional view taken on line 2 2 of Fig. 1.

Fig.. 3 is an elevational sectional view taken on line 3-3 of Fig. 1.

Fig. 4 is a' fragmentary elevational sectional View similar to Fig. 3 and showing the parts in altered position.

-Fig 5' is afragmentar'y elevational sectional view similar to Fig. 4 and showing the parts in still dierent positions.V Y

Fig. 6 is alsectional detail view of adjustment for the timing device and drawn to an enlarged scale.

Fig. 'I is an inverted View of a portion of the toaster taken on line -i of Fig. 2. A

Fig. 8is a wiring diagram of the invention.

My invention comprises a frame A, best shown in Fig. l. This frame carries,` at one portion of the same, a toaster B, and at another portion A still further object of the invention resides in providing an escapement with pallets and in .constructing the movable member with teeth of the same a timing devic'e C for timing the operation of the toaster. These parts will now be described in detail.

The frame A is best shown inFigs.. 'i' and 2 and comprises a base i5 which may be constructed from a suitable plastic material and which extends' about the outer connes of the toaster, being open in the center. This base is, constructed with a circumferentially extending rabbet i@ therein in which the frame A is disposed.v The base it is constructed with feet il which raise the .base above the surface on which the toaster rests and provides spaces i@ therebetween for admmion oi air into the toaster proper.

Frame A includes two vertically extending spaced plates 2i`and 22 which are secured together` at their upper ends by means of a number of shouldered rods 23. These rods are formed with Y threaded reduced ends 24 which pass through the said plates and on which are screwedl nuts 25. By means of this construction the respective plates are held in proper spaced-relation -and are attached to one another at their upper ends. The end plates 2| and 22 areattached to a sub-base 26 by means of ears21 which extend through said sub-base and are bent over upon the underside thereof. 'I'he sub-base 23 is adapted to be received within the rabbet I of base I5 and is secured in said rabbet by means of screws 23 which pass through the said base and are threaded into the sub-base. A

The toasterk B is constructed in the following manner: Extending across the two plates 2| and 22 are a number of supporting bars 29 which have flanges 3| overlying said plates and secured thereto by means of screws 32. These bars are spaced apart to form the toasting ovens which, in the4 particular toaster illustrated, are two in :number and-designated by the referencev numerals 33and 34. The bars 29 are drilled at suitable intervals, as designated at 35 to receive guard wires 9S which extend downwardly from between the inner ends of the guard wires 33 and flanges 33 formed on the bars 29.

A case 39 encloses the entire toaster. The case 33 is constructed with a top 4| and side walls 4 2 and 43 and with end walls 44 and 45 connected thereto. In the top 4| are provided two openings 43 and 41 which register with the spaces between the bars 29 and through which the bread may be inserted into the two ovens 33 and 34.y The case 39 is also received within the rabbet I5 in base |5 and the said case is attached to the base I5 by means of screws 48 which extendthrough the said base and are threaded into brackets 43 is- -suing from the end walls 44 and 45 of said case.

'Ihe toaster B includes a bread carriage. 5|, which is best shown iny Figs. 1 and 2. This bread carriage consists of a plate 52which has two vertically arranged legs 53 and 54. These 4legs are each constructed with iianges 55. The carriage in addition includes a` plate |53 extending at right angles to the plate 52. The latter plate has a ilange |39 overlying the former plate and secured thereto by means of screws |1|.

The carriage 5| is moimted for sliding movement in a support 33. Support 53 is constructed from sheet metal and is formed to provide two spaced uprights 51 and 53. Between -these up# rights is formed a slot 59 extending throughsaid support. 'Ihe lowermost portion' of the support is formed with an attaching lug 6| which is bent outwardly therefrom and whichl is attached to the end plate 2| by means of screws 62. The

upper end of said support is similarly constructed with a 111g 63 which is attached to the end plate guided for vertical sliding movement.

This bar has formed, at the ends thereof, ears 12 and 13 which project through vertical slots 14 formed in the end plates 2| and 22. 'I'he ear 12 is secured tothe ange 55 of carriage 5| by means of screws 13 and the said bread rack is supported thereby'. It will readily be comprehended that movement of the carriage in a vertical direction, causesfthe bread racks to reciprocate vertically withinv the two toast ovens 33 and 34. These bread carriages serve as a means for shifting. the toast from positions adjacent the heating elements to an elevated position in which the same may be removed from the toasting ovens.

The plate |53 of carriage 5|, as best shown in Fig. 2 has a lug 14 projecting outwardly therefrom. One end of a tension coil spring 'l5 is hooked on the said lug and the other of said spring is hooked on another lug 15 formed on the support 55. This spring provides the energy for raising the bread carriage 5| and the two bread racks 63 and 39 when the toasting operation is completed.

. Within the two ovens33 and 34'are disposed rackcon'sists of. a bar of sheet material which is constructed with lugs "projecting outwardly therefrom atv the longitudinal edges thereof. pivoted member -I32 which is constructed of con- In initiating operation of the toaster, the carriage 5| is moved to its lowermost position by means of an arm 11, best shown in Fig. 3. This arm is formed on plate |63. and projects outwardly through a slot 13 in the end wall 45 of the case 39 and has attached to its outer end a finger piece 13 by means of which the said arm may be depressed. When pressure is applied to the said ringer piece, carriage is lowered against the action of spring 15 and they bread racks 58 and 59 brought into toasting position. The case 3'5.

39 is also provided .with a stationary ilnger piece 3|, similar to the iinger piece 19, which finger pieces may be used for carrying the toaster about.

The timing mechanism C of my invention consists of a strip of bi-metal 33, shown in Figs. 2, 3 and 7, which is rigidly attached to a mounting 33. 'I'he mountingA 33 consists of a stamping formed of sheet metal, provided with a body portion 34 to which the said strip of bi-metal is riveted and twoears 35 projecting outwardly therefrom. 'I'he said mounting is pivotally attached to a bracket 33 issuing outwardly/from and forming part of the support 56 on which the carriage 5| is movable. The strip of bi-metal 33 is disposed in avertical plane and the mounting 33 pivoted through a pintle 31 vwhich extends through and Ais secured to the bracket 33. The bracket 36 has screwed into it eccentrically with relation to the pintle 31 a lock screw 33 which is movable in a slot 39 formed on the bracket 33. By means of this screw and slot, the position of the free end 32 of the strip of bi-metal 33 may be adjusted toward androm the end plate 2| of frame A. l

Pivoted to the upright 51 -of support 53 is a bell crank 9| which has two' arms 32 and 33. The -arm 32 is provided with a catch 94 which forms part` of a latch indicated in its entirety by the reference numeral and cooperates with a latch lug 93 issuing outwardly from the plate |63 of the carriage 5|. A tension coil spring 31- is limitedby a pin 93 secured to upright 51, which pin travels in a'slot |3| in the said lever.

Pivoted to the upright 53 of 4support 53 is a assenso siderable weight and which is supported for pivotal movement on a stud |03 secured to the said upright. This member has secured to it a lug |04. Attached thereto is a tension coil spring |05 which is further secured to a lug |06 formed on the upright 5B of support 56, best shown in Fig. 2. This tension coil spring serves to move the member |02 upwardly. The member |02 has formed on it an abutment |01 which is adapted to engage a nger on the arm 33 of bell crank 9|. This abutment, when the member |02 is in its uppermost position, urges the bell crank to swing in a counter-clockwise direction against 95. Theaction of the pivoted member |02 is thus that of a hammer and the same will hence hereafter be referred to as a hammer.

Movement of the hammer |02 is controlled by.

means of two teeth and ||2 formed thereon.

A lever ||3 serving as an escapement is pivoted -by a construction, which will be presently deyond said shoulder. `through an opening in the ybushing |34 and the .The length of the link |35 is such that, when scribed, to the upright 51. This lever is provided with two pallets ||4 and ||5 adapted to engage the teeth and ||2 of the hammer |02. When a step-by-step rotation. The lever ||3 is urged.

'I'he lower end H3 of the lever ||3 is disposed in proximity tothe end 82 of the strip of bi-metal 80, and is adapted to be engaged thereby and moved through the action of the said -strip of bimetal. When the bi-metal 80 is heated theend 82 thereof moves toward the end plate 2| of frame A and swings the escapement in a manner to move the first pallet ||4 out of engagement with the tooth i on the hammer |02. At' the same time the -second pallet ||5 is brought into a position to obstruct complete movement o; the hammer by engagement with the second tooth ||2 thereon. Upon cooling of the strip of blmetal the same moves back to original positionand the secondpallet ||5 is moved out of engagement with the second tooth ||v 2 and the hammer |02 swings freely upwardly until the hammer head |01 engages linger |08 and swings the. bell crankl 9| to disengage latch 94 from latch lug 96. This frees lthe carriage 5| and causes the carriage and bread racks to be raised to'inoperative position by means of the spring 15.

The escapement lever ||3 is supported by a construction, best shown in Fig. 6. Formed on the upright 51 of support 5B is a socket ||1.in.

wardly through a slot |26 in the case A and serves as a means for manually oscillating the said bushing Eccentrically mounted in the bushing H3 is a shouldered screw |21 which serves as a pivot for the. escapement lever 3. This'pivot is disposed above the center of the bushing ||8 so that movement of the said bushing causes the pivot to .move toward and from the'pivot |03 ot the hammer |02. By moving the lever |24 in and out, the depth of engagement of the pallets H4 and |`|5 with the teeth and ||2 can be regulated at will. Attached -to the underside of the'bracket 86 is an insulating block |28. This block supports a switch indicated'in its entirety by the reference numeral |29. This switch includes a xed contact 63| and a spring armA |32 secured thereto which has a contact |33 adapted to Vengage the xed contact |3|. The spring arm |32 has secured to it an insulating bushing |34. Pvotally mounted on the hammer |02 is a link |35formed with a shoulder |36 and a free portion |31 be- Thls free portion passes shoulder |36 serves to depress the saidv bushing and swing `switch 4arm |32 to open the switch.

the hammer |02 is in. its lowermost position, the switch |23 is open. When the rst pallet ||4 releases the first tooth and the pivoted member |02 makes itsv initial movement, link |35 is raised sufiiciently to close the switch |29.

For heating the thermally responsive member r 00, a heater |38` constructed of resistance wire is employed. This heater is electrically connected tothe terminal |39 of the switch |29 and is supported thereby.4 In normal operation the f heater |33 is energized and upon the hammer |02 making its iirst movement the switch |20 is cludes a iixed contact |43 and a spring arm |44 attached to said insulating block. 'The switch arm |44 has a contact |45 adapted to engage lthe xed contact |43. A cam |46 on thearm For the purpose of re-setting the hammer |02,v

a pivoted lever |41 is employed. This lever is pivoted on astud |48 secured to the'- carriage 5|. Lever v|41 has a depending leg |43 formed witha foot |5I thereon, which foot is adapted to engage a pin |56 issuing outwardly from the hammer |02.4 Lever |41 has an arm-|53 which is normally held against an-abutment `|54 on the plate |68 of carriage 5| by means of a tension coil spring |55, attached to said abutment |54 and to the said lever.` When the carriage 5|-is the end of said bushing. 'Ihis lever projects out- 75 'depressed the foot |5| engages the pini-|56 on hammer |02 and moves the said hammer in a. counterclockwise direction.

Throughout such movement said pin travels in a downward direction and also in a direction away from the foot' |5|. Foot |5| is prevented from vfollowingV the pin- |56 due to engagement ot the arm |53 the abutment |34. Therefore pin |33 slides along the under surface of the foot |3|. When the pin |33 reaches the end of said foot, the leg |43 passes said pin and the partsbecome disposed as showninFig. 4. The foot |3| issode- 3 ovens 33 and 34 a tray-|51is employed which v is attached to the underside of the base I3 by means of studs |53 secured to the sub-base 23.

These studs are threaded to receive nuts |53 i3 screwed upon the underside of the said tray which hold theitray in position. The tray |51 has Ventilating openings |3| therein which pei#- rnit of the proper circulation of air through the toaster. Openings |14 vin the end plate conduct 20 air from` the portion of the toaster in which the timing lmechanism C is disposed and into the upper portions of the toast ovens 34 and 33 from which said air may pass outwardly from the toaster through the openings 43 and 41 in the 25 top 4| of the case.

In Fig. 8 I have shown awiring diagram ofv the invention. Current is procured from tw'o leads |32 -and 33 which may be connected to any suitable source of electrical energy. A con- .30

ductor |34 is connected to the lead |33 and connects with the windings of all of the heating elements 31. The other lead A|32 is connected .by means of'a conductor |33 'with the movable The fixed contact |43 35 arm |44 of switch |4|. of said switch is connected through another conductor |33 with the arm |33 of switch |23. The iixed contact |3| .o this switch is connectedv to a conductor |31 which is in turn connected to all of the other terminals of the .windings of 40 the heating elements 31. Heater |33 is con nected to the conductors |33 and |31. It will be comprehended that the switch |4| controls the energization of all of the heating elements, las

well as`theheater |33. When the switch |23 is 4,5

closed heater |33 is shunted byv said switch and thus deenergized.

The operation ofthe invention is as follows: When the toaster is in disuse the parts are positioned as shown in Figs. 1, 2 and 3. Upon ex- 50 erting downward pressure on vthe iinger piece 13, carriage 3| is moved downwardly. During suchmovement the hammer |32 is re-set by4 means of the foot |3| on the lever |41 andthe As the saidhammer is moved downwardly, the abutment |31 formed thereon is disengaged from thenger |33 of bell crank 3| onA which the latch 34 is formed and the said5 latch is free'to move into latching position with'respect to the 60 latch lug 33 on carriage 3|. As the movement of the nger piece 'downwardly continues, the carriage is lowered until the latch lug 33 becomes engaged with the latch 34. At such position the pin |33 on hammer |32 is free from the foot |3| 05 The arrangement'of'parts'is now as shown in 70|.

Fig. 4. The strip of bi-metal 33 now commences' to bow and the free end-32 thereof, which engages'the nger ||3 on lever ||3 moves toward the encll plate 2| and swings said lever in a'counter-clockwise direction, as viewed in Fig. 4. 75

When the nnger piece is initially depressed, hammer |32 is held in its lowermost position by means of thepallet ||4 and tooth.|||'. As the lever ||3 swings. the pallet ||4 is gradually moved outof engagement with tooth ,At the same time the pallet ||3 on the' said lever is moved into a position to be engaged by the other tooth ||2 on the hammer |32. When the pallet ||4 is finally disengaged the parts become 13 positioned as shown in Fig. 5. It will be'noted that. upon release of the hammer4 |32 through disengagement of pallet ||4, the said hammer moves upwardly a distance sufficient to close switch |23'. This switch shunts the heater |33 and the said heater is thereby de-energized. -The strip of bi-metal 33 now commences to cool and the lever ||3 moves in a clockwise direction, as

lviewed in Fig. 5. Such movement4 causes the pallet ||3 to become disengaged from the tooth |-|2. Y It will be noted that in the position of the parts shown in Fig. 5 the abutment |31 is spaced from the ngerv |33 of bell crank 9|. When the strip of bi-metal 33 iinally travels sufficiently away from the end plate 2|, pallet ||3 becomes disengaged from the tooth ||2 on hammer |32 and the said hammer is free to swing through the. action of springv |33. The head |31 `being normally spaced from the linger |33, said hammer is given an opportunity to acquire sufcient movement so that the head |31 gives the said `linger a smart blow and positivelyfdisengages This releases catch 34 from the latch lug 33. the carriage 3| and spring 13 moves said carriage from operative to inoperative position. During such movement switch |4| is opened and the entire toaster de-energized. The parts are lthen dispod, as shown in Fig. 3 and the toaster is readyfor another cycle of operations.

The advantages of my invention are manifest. An extremely simple construction is provided having a minimum number of parts. The toaster is lfully automatic and will operate to toast bread of uniform color regardless of the temperature ofthe toaster when the toasting operation is initiated. By means of the hammer action the latch holding the bread carriage in position is positively and quickly released so that ex tremely accurate timing is procured. By utilizing the spring actuated pivoted member for re` leasing the latch thestrain on the thermally responsive member or strip .of bi-metal is materially reduced so that a relatively small and thin strip oi' bi-metal may be employed which is extremely sensitive and accurate in operation. By y switch |23 controlling the heater |33 is opened. 55

means of the construction employed both the deenergization of the heating elements for the toast ovens and the release of the bread carriage is eflected. By simultaneously adjusting the depth of the engagement of the pallets with the teeth on the hammer different degrees of toasting can be procured and the operation of the toaster at 4diilerent degrees of initial. temperature is unaected.

as herein disclosed, may be made within the `scope of ,what is claimed'without departing from the spirit of my invention. i

Having described my invention, what I claim ass 4new and desire to protect by Letters Patent 1. In a food cooking device, heating means,

food shifting means for moving the food toward l and from the heating means, resilient means for movingthe food shifting means from operative to inoperative position, a latch for holding said mally responsive member during cooling releasfood shifting means in its operative position, a

y pivoted member movable in' opposite directions,

means carried by said pivoted member adapted to engage said latch for disengaging the latch when the pivoted member is moved in one direction, teeth on said pivoted member, an escape- 4 ment lever having a pair of pallets adapted to engage the teeth on said plvoted member. a thermally responsive member movable in opposite 'directions during a cooking period for swinging said lever in opposite directions to release said pivoted member, and means for manually ad- .lusting' the distance between the pivot of said pivoted member and the pivot ofsaid lever to vary the depth of engagement of said pallets vwith said teeth.

2. In a periodically operated food cookingv device, a movable control member for controlling cooking of the food, yielding means for urging movement of the control member from cooking portion of the cooking period to cause movement of the thermally responsive member in one direction, said thermally responsive member cooling during a subsequent portion of the cooking period to cause reverse movement thereof, a pivoted hammer for releasing said latch, yielding means for urging movement of said hammer in one direction, said hammer having two teeth thereon, an escapement having two pallets each ior engagement with a tooth and restraining movement of said hammer, said thermally responsive member during heating moving said escapement in one direction to release one of said 'teeth and cause partial movement of said hammenmeans controlled `by said hammer during such moveing the other of said holding devices to relinquish control of the hammer, said hammer upon release from said holding devices moving without restraint to gain suillcient mementum to release said latch.

' 4. In a periodically operated food cooking device, a movable control member for controlling cooking of the food, yielding means for lurging movement of the control member from cooking to non-cooking position. a latch for restraining said control member from movement by saidyielding means, a timing device for controlling y the release of said control member including a ment for rendering said heater inoperative, said Y thermally responsive member during cooling moving said escapement in the opposite direction to release the other tooth and relinquish control of the hammer, said-hammer upon release from said escapement moving without restraint to 'gain sufncient momentum to release said latch.

3. In a periodically operated food cooking device, a movable control member for controlling cooking or the food; yielding means for urging movement of the control member from cooking to non-cooking position, a latch for restraining said control member from movement by said yielding means, a timing device for controlling the release of said control member including a thermally responsive member, a heater for heating said thermally responsive member during a portion of the cooking periodto cause movement of the thermally responsive member in one direction. said thermally responsive member cooling thermally responsive member. a heater for heating said thermally responsive member during a portion of the cooking period to cause movement of thel thermally responsive member -in one direction, said thermally responsive member cooling during a subsequent portion of the'cooking period to cause reverse movement thereof, a

movable hammer for releasing said latch, yielding means ier urging movement of said hammer in one direction, said second named yielding means being weaker than the nrst named yielding means, two holding devices for restraining movement of said hammer by said yielding means, said holding vdevices being successively operable, said thermally responsive member releasing one of said holding devices during heat- Y ing to 4cause partial movement of said hammer. means controlled by said hammer during such movement for rendering said heater inoperative. said thermally responsive member dul'in cooling releasing the other of said holding devices to relinquish control of the hammer, said hammer upon release from said holding devices moving` without restraint to gain suiiicient momentum to release said latch.

5. In aperlodically operated food cooking device. a movable control member for controlling cooking of the food, yielding means for urging movement of the control member from cooking to non-cooking position, a latch for restrainingsaid control member from movement by said.

yielding means. y. timing device for controlling the release of saidy control member including a thermally responsive member, a heater for heatvingsaidtliermallyresponsivernemberduringa portion of the cooking period tovcause movement of the thermally responsive member in one direction, said thermally responsive member coolduring a subsequent portion of the cooking-period to cause reverse mov/ement thereof, a movable hammer for releasing said latch, yielding means for urging movement of said hammer in one' di rection. two holding devices for restraining movement of said'hammer by said yielding means,

ing during a subsequent portion of the cooking period to cause reverse movement thereof, a movable hammer for releasing said latch. yielding means for urging movement of said hammer in one. direction, a movable member adjacent said hammer, one thereof having two teethand the other having engaging means for engagement 'with said teeth to movement of said hammer, said thermally responsive member during heating moving said movable member in one v direction to release one of 'said teeth and cause for rendering saidheater inoperative, said ther- 'l partial movement of saidhammer, means controlled by said hammer during such movement `forrendering said heater inoperativesaid thermally responsive member during cooling moving said movable member to 'release the second tooth and rellnquishcontrolofthehammensaidhammer upon release from said movable member` moving'. without restraint to -gain sumcient mov said latch.

mentum to release Roemer ssnnssoN. 

